JPH0473550U

JPH0473550U -

Info

Publication number: JPH0473550U
Application number: JP11660890U
Authority: JP
Priority date: 1990-11-06
Filing date: 1990-11-06
Publication date: 1992-06-29

Description

[Brief explanation of the drawing]

第１図は、本考案の一実施例を示すラインサー
マルプリンタ用印字位置補正回路の構成図、第２
図は、第１図の回路の各部の動作を説明するため
の動作波形図、第３図は、ラインサーマルプリン
タの構造図、第４図は、従来のラインサーマルプ
リンタ用印字位置補正回路の構成図、第５図は、
第４図の回路の各部の動作を説明するための動作
波形図である。１……ＣＰＵ、２……パルス発生器、３……メ
モリ、４……カウンタリセツト回路、５……カウ
ント値設定回路、６……パルス発生器、７……第
１のカウンタ、８……第２のカウンタ、９……第
１のゲート回路、１０……第２のゲート回路、１
１……パラレル／シリアル変換回路、１２……シ
フトレジスタ、１９……発熱体。 FIG. 1 is a block diagram of a print position correction circuit for a line thermal printer showing one embodiment of the present invention, and FIG.
The figure is an operation waveform diagram for explaining the operation of each part of the circuit in Figure 1, Figure 3 is a structural diagram of a line thermal printer, and Figure 4 is a configuration of a conventional print position correction circuit for a line thermal printer. Figure 5 is
5 is an operation waveform diagram for explaining the operation of each part of the circuit of FIG. 4. FIG. 1... CPU, 2... Pulse generator, 3... Memory, 4... Counter reset circuit, 5... Count value setting circuit, 6... Pulse generator, 7... First counter, 8... Second counter, 9...First gate circuit, 10...Second gate circuit, 1
1...Parallel/serial conversion circuit, 12...Shift register, 19...Heating element.

Claims

[Claims for Utility Model Registration] (1) A plurality of heating elements are provided along the line direction, and a drive current generated based on print data is supplied to each of these heating elements to generate heat individually. In a line thermal printer in which the printing paper is colored by coloring the printing paper, the number of the above-mentioned heating elements is greater than the number actually used for printing, and the number of heating elements among the plurality of heating elements is used. A printing position correction circuit for a line thermal printer, characterized in that a circuit for determining a heating element use range is provided. (2) The heating element use range determining circuit includes a reference signal generating means for generating a reference signal for determining the timing to start the signal processing operation, and a reference signal generating means for determining the timing to start the printing operation in the line direction. Printing start timing setting means for setting a count value; and when the signal processing operation start signal is given from the reference signal generating means, the counting operation is started and the clock signal supplied from the pulse generator is output. and a first counting means that stops the clock signal output operation when the clock signals corresponding to the number of heating elements have been output; The counting operation is started and the output level thereof is set to a predetermined level, and the counting operation is stopped when the number of pulses corresponding to the value set in the printing start timing setting means is counted. a second counting means for inverting the output level of the second counting means; a first gate circuit that outputs the serial print data outputted from the parallel/serial conversion circuit to a parallel/serial conversion circuit provided at the next stage during a period in which the output level of the second counting means is above the level above. Claim (1) further comprising a second gate circuit that leads to a shift register provided at the next stage during a period in which the signal is inverted to a predetermined level. Print position correction circuit for line thermal printers described.